cabeick



(No Model.) 7

T. J. GARRIOK.

DENTAL VULGANIZER.

Patented June 5, 1883..

C D Fig.7.

E I I I E IIII I I H u I D E E J Fig. 3.

E7 9 1 Fig.2.

T Vl'lnesses; V In Van/07,

Maw.

AUX)? n. 0 1

u warms. Pbolvutbognpher. Wnhinglm n.c

UNITED STATES ATENT OFFICE.

THOMAS J. CABRIOK, OF BALTIMORE, MARYLAND, ASSIGNOR TO HENRY SNOWDEN AND CHAS. H. OOWMAN, OF SAME PLACE.

DENTAL VULCANIZER.

SPECIFICATION forming part of Letters Patent No. 279,079, dated June 5, 1883.

Application filed March 21, 1883.

T all whom it may concern:

Be it known that 1, Tires. J. CARRICK, a citizen of the United States, residing at Baltimore and State of Maryland, have invented certain new and useful Improvements in Dental Vulcanizers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to a vulcanizing-vessel for dentists use, and will first be described, and

- then designated in the claims.

In the drawings hereto annexed, Figure 1 is an elevation or side view of the apparatus, the clamp being shown in section. Fig. 2 is an 1 inverted or bottom view of the apparatus.

Fig. 3 is a top view of the vessel.

The letter A designates the vessel in which the steam is generated during the process of vulcanization B, the cover of the vessel, which is made to fit steam-tight by means of the usual packing-ring or otherwise. A case, 0, for i11- closing a thermometer, and a blow-off cock, D, are provided. All of these parts are of wellknown construction.

An annular clamp, E, has a downward de pending rim or band, E, which is placed over the cover, and is secured to the vessel so as to hold the cover by the following-described means The outer circumference of the vessel at the rim has outwardly-projecting lugs'f, in the present instance three in number, though the number is immaterial. Each of these three lugs occupies nearly one-sixth of the circumference. At one end of each lug is a downwardprojecting point or shoulder, f, which serves as a stop. as hereinafter described. The rim E of the annular clamp is provided on the inner circumference with three inward-projecting lugs, g, which, when the clamp is placed over the cover, first pass between the lugs f on the vessel, and then when the clamp is partly turned the lugs on the clamp engage below the lugs on the vessel. The clamp can be turned on the vessel only until the lugs g of down and made to fit steam-tight by means of the setscrews h in the clamp, which, when (N0 model.)

turned, bear on top of the cover. This feature is well known. I

To facilitate the turning of the clamp when it is desired to remove it after the vulcanizing process has'been finished, (at which time the whole apparatus is usually very hot,) a handle,

I, is provided, which projects laterally from the clamp. By grasping this handle and turning in a horizontal plane the annular clamp may be partly turned or rotated, and thereby the lugs on the one part disengaged from the lugs on the other part. The fact that the handle is attached directly to the cover-re- 6 5 taining clamp enables the latter while hot to be readily lifted off, and then after the cover has been removed the clamp alone may be replaced on the hot vessel, and by means of the handle the vessel may be conveniently tilted to turn out the water. As I employ it,there fore, the handle attached to the .elamp affords advantages not to be obtained when it is attached to the vessel direct. Thus constructed the objections pertaining to a screw and other mechanisms which are more complicated for attaching the annular clamp are obviated.

I do not claim the yoke-clamp as a means of securing a cover to the vessel, which is shown in Letters Patent N 0. 56,945, August 7, 1866. The stop-shouldersf in connection with the annular rim or band Ideem a useful improvement.

Having described my invention, I claim and desire to secure by Letters Patent of the United States 1. A vulcanizing-vcssel having outwardlyprojecting lugs at its rim, each lug being pro vided at one end with a stop-shoulder, f, a cover, and an annular clamp to retain the cover, said clamp being provided on its rim with inwardly-projecting lugs, which first pass between the lugs on the vessel, and then, when the clamp has been partly turned, engage below said'lugs, as set forth. '5

2. In a vulcanizing-vessel, a cover-retaining clamp to turn in a horizontal plane, provided with a laterally-proj ecting handle, as set forth.

In testimony whereof I affiX my signature in presence of two witnesses.

THOMAS J. CARRIOK. lVitnesses J NO. T. MAnnoX, JOHN E. MoRRIs. 

